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Etymotic Research ER4 Earphones, ER4SR, Studio Reference

Choose the ER4SR for studio-quality, flat-response audio, or go with the ER4XR for a touch of added low-end response. Either way, you'll get top-grade audio. Rate and review this product
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Etymotic Research ER4

2 Models to Choose From:

List: $399.99
Savings: $50.00 (13%)
$349.99
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$58.34 details
In Stock Will Ship Sep 25
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Etymotic Research ER4 Earphones

The Etymotic Research ER4 Earphones were the first high-fidelity, noise isolating in-ear earphones to use this technology in a consumer earphone, and are recognized as the world leader for response accuracy to which all other earphones are compared. Over 30 years ago, Etymotic invented noise-isolating, in-ear earphones. Etymotic's original design, developed for auditory research and hearing testing, used balanced -armature receivers and established these speakers as the gold standard for high-definition, in-ear earphones.

ER4XR

The ER4XR is the earphone for music lovers and hi-fi enthusiasts who want uncompromising accuracy in the midrange and high frequencies, but appreciate a bit of extra presence in the lower end. Like the ER4SR, the ER4XR is built with precision machined, anodized and laser-etched aluminum bodies and features user-replaceable detachable cables. The ER4XR also incorporates the stringent channel-matching standard used in the ER4SR. The ER4XR is ideal for anyone looking for exceptional sound quality with just the right amount of low-end enhancement.

ER4SR

The ER4SR is Etymotic's reference standard hi-fidelity earphone, for those who demand nothing less than the highest fidelity. The next generation of our long revered flagship earphone, the ER4S, the ER4SR delivers increased accuracy with greater sound output, or sensitivity. Like its predecessor, the ER4SR channels are matched within an industry-leading 1dB across frequencies from 100Hz to 10 kHz. The ER4SR incorporates significant cosmetic and functional improvements, from a sleek, anodized and laser-etched aluminum body to the reinforced, user-replaceable detachable cable. The ER4SR is a must have for discerning engineers, audiophiles, and consumers wanting the most accurate in-ear earphone available.

World leader in sound reproduction

- Unsurpassed frequency response accuracy and sound quality -- 92%+ response accuracy from 20 Hz - 16 kHz
- The only earphones with balanced-armature, precision-matched, custom-tuned drivers
- Highest output sensitivity in its class

Timeless style and fit

- Professional quality and reliability
- An assortment of noise-isolating eartip options to ensure proper seal and comfort
- CUSTOM•FIT option available

Highest noise isolation

- First earphones to completely seal the ear
- 98% (35 dB - 42 dB) noise isolation --highest of any earphones or headsets on the market today
- Reduction of outside noise reduces the risk of listening at unsafe levels

Best durability and warranty

- 2-year replacement warranty
- User-replaceable filters protect the balanced-armature drivers from ear wax

What's In the Box?

- Earphones
- Detachable, 5 ft. cord with 3.5mm gold plated stereo plug
- ¼" stereo phone adaptor
- Assortment of eartips
- Filter removal tool and replacement filters
- Shirt clip
- Zippered storage case
- Performance certificate

zZounds is an authorized dealer of Etymotic Research products.
- Frequency Response: 20 Hz - 16 kHz
- Transducers: High performance, balanced armature micro-drivers
- Noise Isolation: 35-42 dB
- Impedance (@1kHz): 45 Ohms
- Sensitivity (@1 kHz) SPL at 0.1v: 98 dB
- Maximum Output (SPL): 122 dB
- Cable: 5 ft Detachable
- User Replaceable ACCU-Filters: Yes
- Warranty: 2 Years
Weight, Dimensions, and Manufacturer Part Numbers
ER4XR, Extended Response
Shipping Weight: 1 lbs
Shipping Dimensions: 10 x 7 x 3 in
Manufacturer Part Number (MPN): ER4XR
ER4SR, Studio Reference
Shipping Weight: 1 lbs
Shipping Dimensions: 9 x 7 x 3 in
Manufacturer Part Number (MPN): ER4SR
Customer Reviews
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Need it now but short of cash? All we need is the first payment up front and the rest in easy monthly payments!

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Need it now but short of cash? All we need is the first payment up front and the rest in easy monthly payments!

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We approve everyone, with very few exceptions, as long as we can verify your identity.
No interest. Ever.
It's just as if you paid the whole amount up front!
No paperwork. Nothing to track.
No application to mail or fax, no bills to pay. We automatically charge the payments to your credit card.

We'll wait on your money so you don't have to wait for your gear!

When you checkout, just click the Play as you Pay checkbox to indicate which installment plan you wish to use.

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no minimum

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Why fight traffic and pushy salesmen when we'll bring your gear straight to your home, free of charge?

zZounds free shipping is really free!
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We have warehouses on both coasts, so most shipments arrive in 3 days or less.
We don't collect sales tax. Bonus!
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